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AquaStop Valves - Unique Click-Fit technology allows for fast set up and leak-proof maintenance. The valves rotate and are at 55-degree angles for easy positioning. They can be used to regulate water flow with no harm to the motor or its components.

Purge Valve - The valve drain allows for partial discharge of debris without needing to move the unit, open the filter lid, or disconnect hosing.

Although i've had some problems with my canister at first with micro bubbles and cavitation i've come to figure out none of those where the fault of the canister.

All in all it's a quit, large media and water capacity canister. It's rated up to 400gallons which is the largest i've seen from most filters around the same price.

Definitely shop around online as the local stores will gouge you.
And as for the suggested media also look into alternative as the fluval ones are also overpriced.

I gave it an 9 only because it made me mad when it wasn't working right(even though it wasn't it's fault) and changing it could be a little better. Unhooking a hose for me usually causes some water to come out even if the stoppers are closed.

You you truly want better quality filtration look at getting two smaller filters. But if you want one large capacity filter then this one is just fine.

Although a little pricey, you can find an FX5 on the web for less than what they will charge you in your lfs. This filter does what its touted to do. Water flow is phenomenal: 600+ gallons per hour with media. Unbelievably quiet! Easy connections. Easy media changes. 3 year warranty. (register with Hagen) This is the best, most efficient and hard-working filter I have ever had. And it uses only 48 watts...

This is my first canister filter. Bought it because I wanted very clean and clear water for my Mbunas. Setup, priming, adding media, and startup were super easy. It's been running for 44 days with no problems. It is very quiet compared to some other canisters I've heard.
The only drawback to this filter is it's size. It's footprint makes it hard to fit in any stand smaller than one which would hold a 125g aquarium.

Wow! Great product and definitely a value if you buy through Amazon. The flow rate is easily controllable with the flow valve and the adjustable nozzles. Very easy to set up...unless your wife is distracting you and you put the output on the input and the input on the output...then you start it...that makes things complicated. The tank is cleaner and the fish are definitely enjoying the current. The multiple trays allow you to tailor the filtration to your tank and ensure you are getting what you need. I would definitely recommend this to anyone with 55G or larger.